tree 1187344fb5d964a81db2894eb7b4b689fc30491a
parent a935f0bdeb1715ad819c92fc75a49ed3374d5585
author Marc Hoersken <info@marc-hoersken.de> 1598631707 +0200
committer Marc Hoersken <info@marc-hoersken.de> 1598687339 +0200
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select: simplify return code handling for poll and select

poll and select already return -1 on error according to POSIX,
so there is no need to perform a <0 to -1 conversion in code.

Also we can just use one check with <= 0 on the return code.

Assisted-by: Daniel Stenberg
Reviewed-by: Jay Satiro

Replaces #5852
Closes #5880